textproduct: Quad Cities

KEY MESSAGES

- Quiet weather and pleasant temperatures and humidity continue into Monday.

- Mainly dry this week with 20 to 40 percent chances of showers and storms on Wednesday and again next Saturday.

SHORT TERM /THROUGH MONDAY/

Issued at 110 AM CDT Sun Aug 23 2026

Deep northwesterly flow aloft continues across the Upper Midwest through Monday. High pressure is forecast to drift across the area with lighter winds today and Monday. Temperatures today will be cooler ranging from 75 to 80 degrees. Dewpoints today will be noticeably lower and be in the mid to upper 50s so it will feel pleasant across the area today. Temperatures Sunday night will drop into the mid to upper 50s.

On Monday, model consensus as surface high pressure to the east o the area with light southerly return flow setting up across the area. Aloft, models show a slight eastward shift in high pressure to our southwest which pushes the northwest flow east of the area. Quiet weather is expected through the day but some models show a subtle shortwave within the flow that could overspread the area. The current forecast and NBM consensus for Monday is dry with sunny skies and precipitation remaining to the west across central and western Iowa. Depending on the exact placement of this shortwave, decaying showers may move into the far western edge of our CWA west of a Vinton to Fairfield to Keosauqua line with dry air in place across the area. High temperatures on Monday are expected to be in the upper 70s.

LONG TERM /MONDAY NIGHT THROUGH SATURDAY/

Issued at 110 AM CDT Sun Aug 23 2026

Northwesterly flow aloft is forecast to continue through the upcoming week. A storm system is forecast to pass to our north and east Tuesday night through Wednesday night with 25 to 40 percent chances of showers and storms. Models show a slight increase in moisture ahead of this storm system. Currently the higher chances of precipitation are across northwest Illinois. Rainfall amounts will be light with generally less than a tenth of an inch expected. High temperatures on Wednesday will be slightly warmer with high temperatures in the lower to mid 80s.

After Wednesday night, models show the northwest flow as another shortwaves tops the western US ridge flattening the flow to a zonal. This will overspread the area late Friday into Saturday bringing anther low chance of precipitation to the area.

AVIATION /12Z TAFS THROUGH 12Z MONDAY/

Issued at 610 AM CDT Sun Aug 23 2026

VFR high pressure will continue to remain over the region today through Monday morning, with skies mostly clear and light northwest winds becoming light and variable overnight.

DVN WATCHES/WARNINGS/ADVISORIES

IA...None. IL...None. MO...None.